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lower esophageal sphincter

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Illustration of the digestive tract showing the esophagus, lower esophageal sphincter, and stomach with gas accumulation

Biology & Digestion

Why Do We Burp?

Burping releases swallowed air and fermentation gas from the stomach. The sound comes from the vibration of your upper esophageal sphincter as air rushes past it.

burpingeructation